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\title{802.16-2009 OFDM PHY - Digital Realm Transmitter Implimentation}
\author{Cody Schafer}
\date{\today}
\begin{document}
\maketitle

\include{./intro.tex}

\section{Electrical Characteristics}
All voltages of logic levels are defined by the FPGA on which the product's
code is placed.

\todo[inline]{Need these defined}

\todo[inline]{see design_and_spec.tex}

%% FRAME
%% BURST

\todo{see planned.tex}

%% RAND
 
\todo{see impl/rand.tex}

%% FEC

\todo{see impl/reed-solomon.tex}

%% FEC TO INTERLEAVER


%% INTERLEAVER

\todo{See impl/interleave.tex}

% CONSTELLATION MAPPING
% IFFT INPUT BUFFER.

% IFFT
% CYCLIC PREFIX

\todo{See planned.tex}

\section{Testing Considerations}
\section{Economic Analysis}
\section{Power Consumption}
\section{FPGA Implementation}
  \subsection{Sampling and Clock Rate}
    From the IEEE 802.16 standards document, the sampling rate for
    256-OFDM is defined as
    \begin{equation}
    F_s = BW * 7/6
    \end{equation}
  
  \begin{center}
  \begin{tabular}{c|c}
  Channel Bandwidth & Sampling Rate \\ \hline
  14 MHz & 16.333 MHz \\
  7 MHz & 8.166 MHz \\
  3.5 MHz & 4.083 MHz \\
  1.75 MHz & 2.042 MHz
  \end{tabular}
  \end{center}
  
  This design should be able to run on both the Spartan-3 FPGA and Virtex 4 LX60
  FPGA as they both supply a 500 MHz clock.
  
  \subsection{Power Calculation}
  
  Calculate power based on required clock frequency for the device as well as the
  FPGA specifications for voltage inputs.
  
  Absolute Maximum rating for $V_{in}$ : 4.4 V
  
  Clock frequency required for a 3.5 MHz channel bandwidth : 4.083 MHz
  
  Input capacitance over recommended operating conditions : 10 pF
	%Input capacitance per input pin?
  \begin{center}\begin{equation}
  P = C * V^2 * f = 10 pF * (4.4 V)^2 * 4.083 MHz = 0.18 mW
  \end{equation}\end{center}
  \todo[inline]{Is this correct?}
  
	%\subsection{Pin outs}
	%XC3S200-FT256
	%//Top and Bottom View Package FT256 -   %http://www.xilinx.com/support/documentation/package_specs/ft256.pdf 
	%\section{Datasheet(Spartan-3 FPGA}
	%\subsection{Electrical Characteristics}
	%\begin{tabular}
	%\end{tabular}


\end{document}
